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U.S. National Security Agency whistleblower Edward Snowden, an analyst with a U.S. defence contractor, is seen in this still image taken from a video during an interview with the Guardian in his hotel room in Hong Kong June 6, 2013. (Credit: Reuters/Courtesy of The Guardian/Glenn Greenwald/Laura Poitras/Handout)

U.S. National Security Agency whistleblower Edward Snowden, an analyst with a U.S. defence contractor, is seen in this still image taken from a video during an interview with the Guardian in his hotel room in Hong Kong June 6, 2013. (Credit: Reuters/Courtesy of The Guardian/Glenn Greenwald/Laura Poitras/Handout)